Selenium 3 geckodriver does not work with Firefox with plugins Firebug and HAR Export Trigger

[Linsong Wang]

I have been using Selenium 2.53.1, together with Firefox 46, Firebug 2.0.18 and HAR Export Trigger 0.5.0-beta.7 to get web page load time.

But when I try to use Selenium 3.0.1, plugin HAR Export Trigger does not work anymore, with both Firefox 46 and Firefox 49.

The error is when I try to call javascript HAR.triggerExport  , "HAR not found".

Anybody has experience of this?